$ajaxFileUpload可以带参数文件上传源码及使用

最近项目使用js的easyui框架，由于后台页面布局没有使用easyui框架做，只是在弹框和新增删除修改等操作使用easyui，需要用到ajax异步上传文件。

经过一番折腾终于将ajaxFileUpload带参数上传及兼容多款浏览器(IE,火狐，谷歌等)

先将源码上传

ajaxfileupload.js内容如下

jQuery.extend({

createUploadIframe: function(id,uri)

{

//create frame

var frameId = 'jUploadFrame' + id;

if(window.ActiveXObject) {

var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');

if(typeof uri== 'boolean'){

io.src = 'javascript:false';

}

else if(typeof uri== 'string'){

io.src = uri;

}

}

else {

var io = document.createElement('iframe');

io.id = frameId;

io.name = frameId;

}

io.style.position = 'absolute';

io.style.top = '-1000px';

io.style.left = '-1000px';

document.body.appendChild(io);

return io

},

createUploadForm: function(id,fileElementId,data)

{

//create form

var formId = 'jUploadForm' + id;

var fileId = 'jUploadFile' + id;

var form = $('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');

var oldElement = $('#' + fileElementId);

var newElement = $(oldElement).clone();

$(oldElement).attr('id',fileId);

$(oldElement).before(newElement);

$(oldElement).appendTo(form);

//增加文本参数的支持

if (data) {

for (var i in data) {

$('<input type="hidden" name="' + i + '" value="' + data[i] + '" />').appendTo(form);

}

}

//set attributes

$(form).css('position','absolute');

$(form).css('top','-1200px');

$(form).css('left','-1200px');

$(form).appendTo('body');

return form;

},

ajaxFileUpload: function(s) {

// TODO introduce global settings,allowing the client to modify them for all requests,not only timeout

s = jQuery.extend({},jQuery.ajaxSettings,s);

var id = new Date().getTime()

var form = jQuery.createUploadForm(id,s.fileElementId,s.data);

var io = jQuery.createUploadIframe(id,s.secureuri);

var frameId = 'jUploadFrame' + id;

var formId = 'jUploadForm' + id;

// Watch for a new set of requests

if ( s.global && ! jQuery.active++ )

{

jQuery.event.trigger( "ajaxStart" );

}

var requestDone = false;

// Create the request object

var xml = {}

if ( s.global )

jQuery.event.trigger("ajaxSend",[xml,s]);

// Wait for a response to come back

var uploadCallback = function(isTimeout)

{

var io = document.getElementById(frameId);

try

{

if(io.contentWindow)

{

xml.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:null;

xml.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;

}else if(io.contentDocument)

{

xml.responseText = io.contentDocument.document.body?io.contentDocument.document.body.innerHTML:null;

xml.responseXML = io.contentDocument.document.XMLDocument?io.contentDocument.document.XMLDocument:io.contentDocument.document;

}

}catch(e)

{

jQuery.handleError(s,xml,null,e);

}

if ( xml || isTimeout == "timeout")

{

requestDone = true;

var status;

try {

status = isTimeout != "timeout" ? "success" : "error";

// Make sure that the request was successful or notmodified

if ( status != "error" )

{

// process the data (runs the xml through httpData regardless of callback)

var data = jQuery.uploadHttpData( xml,s.dataType );

// If a local callback was specified,fire it and pass it the data

if ( s.success )

s.success( data,status );

// Fire the global callback

if( s.global )

jQuery.event.trigger( "ajaxSuccess",s] );

} else

jQuery.handleError(s,status);

} catch(e)

{

status = "error";

jQuery.handleError(s,status,e);

}

// The request was completed

if( s.global )

jQuery.event.trigger( "ajaxComplete",s] );

// Handle the global AJAX counter

if ( s.global && ! --jQuery.active )

jQuery.event.trigger( "ajaxStop" );

// Process result

if ( s.complete )

s.complete(xml,status);

jQuery(io).unbind()

setTimeout(function()

{ try

{

$(io).remove();

$(form).remove();

} catch(e)

{

jQuery.handleError(s,e);

}

},100)

xml = null

}

}

// Timeout checker

if ( s.timeout > 0 )

{

setTimeout(function(){

// Check to see if the request is still happening

if( !requestDone ) uploadCallback( "timeout" );

},s.timeout);

}

try

{

// var io = $('#' + frameId);

var form = $('#' + formId);

$(form).attr('action',s.url);

$(form).attr('method','POST');

$(form).attr('target',frameId);

if(form.encoding)

{

form.encoding = 'multipart/form-data';

}

else

{

form.enctype = 'multipart/form-data';

}

$(form).submit();

} catch(e)

{

jQuery.handleError(s,e);

}

if(window.attachEvent){

document.getElementById(frameId).attachEvent('onload',uploadCallback);

}

else{

document.getElementById(frameId).addEventListener('load',uploadCallback,false);

}

return {abort: function () {}};

},

uploadHttpData: function( r,type ) {

var data = !type;

data = type == "xml" || data ? r.responseXML : r.responseText;

// If the type is "script",eval it in global context

if ( type == "script" )

jQuery.globalEval( data );

// Get the JavaScript object,if JSON is used.

if ( type == "json" ){
////////////以下为新增代码///////////////
data = r.responseText;
var start = data.indexOf(">");
if(start != -1) {
var end = data.indexOf("<",start + 1);
if(end != -1) {
data = data.substring(start + 1,end);
}
}
///////////以上为新增代码///////////////
eval( "data = " + data);
}
// evaluate scripts within html

if ( type == "html" )

jQuery("<div>").html(data).evalScripts();

//alert($('param',data).each(function(){alert($(this).attr('value'));}));

return data;

}

})

//------------------------------------------------------------------------------------------完美的分割线----------------------------------------------------------------------------------------------------//

在需要使用上传的页面引用这个js即可

然后使用ajax文件上传方法

//ajax上传文件
$.ajaxFileUpload({
url:path+'/project/head!addHead.action?addHeadName='+encodeURI(addHeadName),
type:'post',
secureuri:false,
fileElementId:'addHeadImg',
dataType: 'json',
success: function (msg,status)
{
if(msg==true){
$.messager.alert('操作提示','新增成功!','info',function(){
$('#headDialog').dialog('close');
window.parent.frames['mainFrame'].location.href=path+'/project/head!findHead.action';
});
}
if(msg==false){
$.messager.alert('操作提示','新增失败!','error');
}
}
,
error:function(data,e){
$.messager.alert('提示','与服务端交互失败!','error');
}
});

//使用完毕

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（编辑：李大同）

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